She is feeding quite a bit and as I've been feeling a little unwell today (sore throat - Mike's been ill too the last few days) I've been worried she's not getting enough milk and have been offering both breasts (heck, should this be in the BF forum??) which she has been taking.
She's not shouting with colic so I'm thinking (b) or (c) above.
Anyone else had this happen all of a sudden? Up until today, normal mustard colour poo you would expect from a BF baby.